So-Called 511E's on the Bay

[bfish]

I've only used it in applications at my job. I work for a mechanical contractor, and some of our installations have to pass rigourous noise/vibration performance testing. When we have instances that are tested out of limits (by a 3rd party firm), we have to fix it. I've had our crews apply the Grainger compound in several cases, and it did the job in all. These were all ductwork/equipment panel applications, with offending noise in the ~1K-5K BW. Other applications (pumps, piping, etc.) usually require other solutions like foam/cork pads or isolation hangers.

To date, there's been no leftover material for me to bring home...

I'm sure the pads you mentioned are effective in their place, but I doubt that wood cabinets/LF apps would qualify as that place. For pad type of material, I use a constrained layer foam/foil product that GM turned me on to from Home Depot*. Way cheaper than damping compounds, and very cost effective on horns. It ain't pretty, but that's OK. (it's beatiful compared to the candle wax/peanut butter/mass-quantity-silicone...)

* http://www.homedepot.com/Building-Ma...atalogId=10053

I still use 'glass for cabinets, it's effective, cheap, easy to come by, and not nearly as hazardous as some would have you believe.

[Audio_by_Goodwill]

I'm confused........ the company that makes the renamed Aquaplas claims to be Canadian, and has only been around since the late 70's......... wasn't Altec using it MUCH earlier than that? Is this the case of concealing the manufacturer in favor of the marketing company, or purchasing the rights to a product? I just don't how this can be the same stuff unless there's more to the story.

[bfish]

Altec isn't the only company that's changed hands/ownership/structuring/location in the last 50 years...

WirRep had roots with Blachford, which had roots with... all the way back to Germany and WWII.

"Secrets" have nothing to do with it. At one time, Aquaplas was a patented product, and trade rights were protected accordingly for the normal period. That period has been over for a long time.

I sincerely doubt that any of it is exactly the "same stuff" as produced 50 years ago... what is? All that matters is that it does the same job (or better).

[Old Guy]

"aspirin" used to be a Bayer trademark...

as did others...


http://theformofmoney.blogharbor.com/OpiumBayer.gif

[Altec Best]

I'm confused........ the company that makes the renamed Aquaplas claims to be Canadian, and has only been around since the late 70's......... wasn't Altec using it MUCH earlier than that? Is this the case of concealing the manufacturer in favor of the marketing company, or purchasing the rights to a product? I just don't how this can be the same stuff unless there's more to the story.

I think it is kinda like what Altec did with Heathkit,and IPC where they were the manufacturer and allowed other companies to label them.

To date, there's been no leftover material for me to bring home...

I still use 'glass for cabinets, it's effective, cheap, easy to come by, and not nearly as hazardous as some would have you believe.

Need to add an extra pail to the next job That's what I figured glass has been used for a very long time and is still the material of choice for cabinets in most cases.

I sincerely doubt that any of it is exactly the "same stuff" as produced 50 years ago... what is? All that matters is that it does the same job (or better in some cases). In the case of AntiVibe, it's probably as close as one can get.

But I think the formula is close enough to were it's damping characteristics are the same or better.As Noted

[bfish]

Exactly.

"Aquaplas" isn't listed at the USPTO as a registered trade name for an acoustic product, even as a long-dead one. It was the product formulation that was protected under patent law for a period.

Added;
Don't be surprised if "AntiVibe" changes name again, especially if Stanley finds it in competition with its' trade name hammer handles.

People put waaay too much faith in a name.

[Audio_by_Goodwill]

Ok, I see....... It seems like this may be either a corporate purchase/sale situation, or a Klenex-tissue/Scotch-tape situation. .......or a little of both.

[Audio_by_Goodwill]

Exactly.

It was the product formulation that was protected under patent law for a period.

By Who? Didn't JBL use it too?

[bfish]

By Who? Didn't JBL use it too?

By whoever held the patent. JBL used it, others used it, anyone could use it that wanted to buy some. They just couldn't make it and sell it themselves.

The same was true for Kapton (polymide) coil forms for a while. And lots of other things.

[bfish]

Ok, I see....... It seems like this may be either a corporate purchase/sale situation, or a Klenex-tissue/Scotch-tape situation. .......or a little of both.

That's pretty close.

GPA made diaphragms using old Altec tooling and methods after the parent company quit doing it. They don't carry the Altec name, but what does it matter?

Actually, it does seem to matter to the buying public, due to their tendency to attach themselves to particular names. Some would buy a vintage horn over a new one because it has "real" Aquaplas. Just proves the old adage "A fool and his money are some party".

Added
(and why corporations are willing to pay for familiar trade names).